气候变化领域集成服务门户(CCPortal): Detailed quantification of glacier elevation and mass changes in South Georgia

CCPortal

DOI	10.1088/1748-9326/ab6b32
	Detailed quantification of glacier elevation and mass changes in South Georgia
	Farías-Barahona D.; Sommer C.; Sauter T.; Bannister D.; Seehaus T.C.; Malz P.; Casassa G.; Mayewski P.A.; Turton J.V.; Braun M.H.
发表日期	2020
ISSN	17489318
卷号	15 期号:3
英文摘要	Most glaciers in South America and on the Antarctic Peninsula are retreating and thinning. They are considered strong contributors to global sea level rise. However, there is a lack of glacier mass balance studies in other areas of the Southern Hemisphere, such as the surrounding Antarctic Islands. Here, we present a detailed quantification of the 21st century glacier elevation and mass changes for the entire South Georgia Island using bi-static synthetic aperture radar interferometry between 2000 and 2013. The results suggest a significant mass loss since the beginning of the present century. We calculate an average glacier mass balance of -1.04 0.09 m w.e.a-1 and a mass loss rate of 2.28 0.19 Gt a-1 (2000-2013), contributing 0.006 0.001 mm a-1 to sea-level rise. Additionally, we calculate a subaqueous mass loss of 0.77 0.04 Gt a-1 (2003-2016), with an area change at the marine and lake-terminating glacier fronts of -6.58 0.33 km2 a-1, corresponding to ∼4% of the total glacier area. Overall, we observe negative mass balance rates in South Georgia, with the highest thinning and retreat rates at the large outlet glaciers located at the north-east coast. Although the spaceborne remote sensing dataset analysed in this research is a key contribution to better understanding of the glacier changes in South Georgia, more detailed field measurements, glacier dynamics studies or further long-term analysis with high-resolution regional climate models are required to precisely identify the forcing factors. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	elevation changes; glacier mass balance; InSAR; sub-antarctic glaciers
语种	英语
scopus关键词	Climate models; Remote sensing; Sea level; elevation changes; Glacier mass balance; Global sea level rise; InSAR; Regional climate models; Southern Hemisphere; Spaceborne remote sensing; Synthetic aperture radar interferometry; Synthetic aperture radar; elevation; glacier dynamics; glacier mass balance; quantitative analysis; radar interferometry; regional climate; remote sensing; synthetic aperture radar; Antarctic Peninsula; Antarctica; South America; South Georgia; West Antarctica
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154154
作者单位	Institut für Geographie, Friedrich-Alexander-Universit t Erlangen-Nürnberg, Erlangen, Germany; British Antarctic Survey, Cambridge, United Kingdom; SATAVIA LTD, Cambridge, United Kingdom; Dirección General de Aguas, Santiago, Chile; Universidad de Magallanes, Punta Arenas, Chile; Climate Change Institute, University of Maine, Orono, United States
推荐引用方式 GB/T 7714	Farías-Barahona D.,Sommer C.,Sauter T.,et al. Detailed quantification of glacier elevation and mass changes in South Georgia[J],2020,15(3).
APA	Farías-Barahona D..,Sommer C..,Sauter T..,Bannister D..,Seehaus T.C..,...&Braun M.H..(2020).Detailed quantification of glacier elevation and mass changes in South Georgia.Environmental Research Letters,15(3).
MLA	Farías-Barahona D.,et al."Detailed quantification of glacier elevation and mass changes in South Georgia".Environmental Research Letters 15.3(2020).